JSON to Kotlin

Hand-writing Kotlin data classes from a payload misses fields. Paste JSON to generate classes. Enable Gson, Moshi, or kotlinx.serialization as needed. Use the online cURL generator for HTTP commands.

What it is for

Turn an API JSON sample into a paste-ready Kotlin data class for Android DTOs.

How to use

Paste a JSON sample and set the class name, for example User.
Optionally enable Gson, Moshi, or kotlinx.serialization.
Copy the data class into your Android project.

FAQ

Is the JSON uploaded?

No. Generation stays in the browser.

How is this different from the online cURL generator?

This page builds a Kotlin data class from JSON. The online cURL generator turns an HTTP request into a curl command.

More in this topic: JSON Tools Online